const throttle = {
    mounted(el, binding) {
        let throttleTime = binding.value // 防抖时间
        if (!throttleTime) { // 用户若不设置防抖时间，则默认500ms
            throttleTime = 500
        }
        let timer
        let disable = false
        el.addEventListener('click', event => {
            if (timer) {
                clearTimeout(timer)
            }
            if (!disable) { // 第一次执行(一点击触发当前事件)
                disable = true
            } else {
                event && event.stopImmediatePropagation()
            }
            timer = setTimeout(() => {
                timer = null
                disable = false
            }, throttleTime)
        }, true)
    }
}
export default throttle